JP2008087174A - Washing apparatus for printing plate - Google Patents

Washing apparatus for printing plate Download PDF

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JP2008087174A
JP2008087174A JP2006267203A JP2006267203A JP2008087174A JP 2008087174 A JP2008087174 A JP 2008087174A JP 2006267203 A JP2006267203 A JP 2006267203A JP 2006267203 A JP2006267203 A JP 2006267203A JP 2008087174 A JP2008087174 A JP 2008087174A
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plate
cleaning
nozzle
cleaning liquid
printing
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JP4984796B2 (en
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Tomoaki Fukuhara
智朗 福原
Yukio Konaka
行雄 小中
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Toppan Inc
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Toppan Printing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus which prevents particles of a washing liquid containing a light emitting component, which have collided with a plate, reflected and splashed from adhering to an organic EL element board in a plate washing apparatus in order to completely remove an organic EL agent ink from the printing plate when the pattern of a light-emitting layer of an organic EL element is formed by the flexographic printing method, and to provide the plate washing apparatus which can save the liquid and is superior in washing capability. <P>SOLUTION: This washing apparatus is provided which keeps the washing apparatus and a section to be washed covered with a cover and turns the inside of the cover depressurized. The particles of the splashed washing liquid are guided to an exhaust port from the inside of the cover and prevented from adhering to an article to be printed. Also, for the washing apparatus, one or a plurality of pulse jet type nozzles which repeat the spraying of the washing liquid over a short period of time, and repeat ON-OFF are arranged in parallel. By providing the washing apparatus, an excessive consumption of the washing liquid is suppressed as an apparatus which can select the washing nozzle to be used depending on a printing pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、回転する版胴を有する印刷機に設置して、版胴上の印刷版を洗浄する装置に関する。さらに詳しくは、有機エレクトロルミネッセンス(EL)素子の発光層の印刷機に設置して好適な版洗浄装置に関する。   The present invention relates to an apparatus that is installed in a printing press having a rotating plate cylinder and cleans the printing plate on the plate cylinder. More specifically, the present invention relates to a plate cleaning apparatus suitable for installation in a printing machine for a light emitting layer of an organic electroluminescence (EL) element.

現在、微細なパターンを被写体に面内均一かつ高位置精度で、さらに連続的に安定して形成する方法としてフォトリソグラフィー法が主に使用されている。   At present, a photolithography method is mainly used as a method for forming a fine pattern on a subject uniformly in a plane with high positional accuracy and more continuously and stably.

しかしながら、フォトリソグラフィー法はプロセスが複雑で、パターン形成に必要な製造設備等が高価であるために、製造コストが高くなるという問題がある。   However, the photolithography method has a problem in that the process is complicated and the manufacturing equipment necessary for pattern formation is expensive, resulting in an increase in manufacturing cost.

また、フォトリソグラフィー法に代わって、印刷用ブランケットとしてシリコーン系ゴムを用いたものを使用し、印刷用ブランケットから被印刷体としてガラス等の基板へ印刷インキを転写させるオフセット印刷もあるが、印刷パターンが形成されていない非画線部分のインキは刷版で除去され廃棄されてしまう為、インキの使用効率(インキマイレージ)に優れるフレキソ印刷方式が注目されつつある。(特許文献1、2)
このフレキソ印刷機において、インキ供給装置からアニロックスロールへ供給されたインキは、フレキソ版の凸部へ転移する。さらに該凸部上のインキは、被印刷物である有機EL素子用の透明基板上へ転移する。しかし、インキの性質上、該インクの一部は転移せず該凸版上に残留してしまう。アニロックスロールからのインキ供給量はかなり定量性が高いが、該凸部上に残留したインキは、連続的に印刷を行う場合においては、凸部の側面に回り込み、さらに凸部間のレリーフと呼ばれる溝にインキが入り込んでしまう。その結果、凸部以外から該透明基板上にインキが転写してしまう事態が発生して、印刷品質の低下を招いてしまうという問題点があった。そのため、連続印刷の途中で、定期的に刷版(版胴にとりつけたフレキソ版)上に付着した余分なインキを洗浄する為の版洗浄装置が必要であった。
In addition, instead of photolithography, there is offset printing that uses silicone rubber as a printing blanket and transfers printing ink from a printing blanket to a substrate such as glass as a substrate. Since the ink in the non-image area where no ink is formed is removed by the printing plate and discarded, a flexographic printing method excellent in ink use efficiency (ink mileage) is drawing attention. (Patent Documents 1 and 2)
In this flexographic printing machine, the ink supplied from the ink supply device to the anilox roll is transferred to the convex portion of the flexographic plate. Furthermore, the ink on the convex portion is transferred onto a transparent substrate for an organic EL element which is a printing material. However, due to the nature of the ink, a part of the ink does not transfer and remains on the letterpress. The amount of ink supplied from the anilox roll is fairly quantitative, but the ink remaining on the convex part wraps around the side of the convex part when printing continuously, and is called relief between convex parts Ink enters the groove. As a result, there has been a problem in that a situation in which ink is transferred onto the transparent substrate from other than the convex portion causes a decrease in print quality. For this reason, a plate cleaning device for cleaning excess ink adhering to the printing plate (flexographic plate attached to the plate cylinder) periodically during the continuous printing is required.

版胴上の印刷版を洗浄する装置としては、例えば特許文献3に、版胴上のグラビア版を洗浄する装置が開示されている。該洗浄装置は、グラビアロールに向けて洗浄液を噴出する洗浄液噴出ヘッドと、版に噴出した洗浄液と共に版に残留している未転写インクを吸引回収する吸引回収ヘッドと吸引ブロアからなっている。しかし、版に衝突した洗浄液にはインキ成分が含まれているが、それが跳ね返って飛散し、被印刷物やその他の不都合な部分(特許文献3ではオフセットロール)に付着して混色し、印刷物の品質を低下させてしまうこと、に対する対策は記載されていない。通常の印刷物においては、そこまで厳しく混色を低減する必要がないからである。   As an apparatus for cleaning a printing plate on a plate cylinder, for example, Patent Document 3 discloses an apparatus for cleaning a gravure plate on a plate cylinder. The cleaning device includes a cleaning liquid jet head that jets cleaning liquid toward the gravure roll, a suction recovery head that sucks and collects untransferred ink remaining on the plate together with the cleaning liquid sprayed onto the plate, and a suction blower. However, the cleaning liquid that collided with the plate contains an ink component, but it bounces back and scatters, adheres to the substrate and other inconvenient parts (offset roll in Patent Document 3), and mixes the colors. No countermeasures are described for reducing the quality. This is because there is no need to severely reduce color mixing in ordinary printed matter.

一方、洗浄液が跳ね返って有機EL素子の基板に付着すると、所定の発光色以外の発光色が混ざって発光するという、ディスプレイ装置としては非常に不都合な事態が発生する。すなわち、有機EL素子の発光層を形成する場合には、通常の印刷物を作成する場合よりも版洗浄液の飛散・付着による混色について厳しく抑制することが必要である。しかし、具体的な方法について開示されているものは見あたらない。   On the other hand, when the cleaning liquid rebounds and adheres to the substrate of the organic EL element, a very inconvenient situation occurs as a display device in which light emission colors other than a predetermined light emission color are mixed and light is emitted. That is, when forming a light emitting layer of an organic EL element, it is necessary to strictly suppress color mixing due to scattering and adhesion of the plate cleaning liquid, compared to the case of creating a normal printed matter. However, no specific method is disclosed.

また、従来の版洗浄装置ではスリットノズルなどで刷版全幅、あるいは固定幅でのみ洗浄液を吐出し洗浄を行っていた。従って、版の非画線部、或いはインキが塗布されていない画線部へも洗浄液を吹き付ける為、版表面が膨潤したり、余分な洗浄液を吐出する事でランニングコストもかかり、環境負荷も大きい等の問題があった。
特開2004−322329号公報 特開2005−059348号公報 特開2002−172765号公報
Further, in a conventional plate cleaning apparatus, cleaning is performed by discharging a cleaning liquid only with a full width of the printing plate or with a fixed width using a slit nozzle or the like. Therefore, since the cleaning liquid is sprayed to the non-image area of the plate or the image area where no ink is applied, the surface of the plate swells and the excess cleaning liquid is discharged, so there is a running cost and a large environmental load. There was a problem such as.
JP 2004-322329 A JP 2005-059348 A JP 2002-172765 A

本発明が解決しようとする課題は、フレキソ印刷法によりパターン形成する際に、印刷物の品質の低下を招くインキ洗浄液の粒子の飛散・再付着を発生させずに、インクを刷版から完全に除去し印刷版表面の乾燥を行う版洗浄装置を提供すると共に、省液化が可能で洗浄能力に優れる版洗浄装置を提供する事である。   The problem to be solved by the present invention is that when forming a pattern by flexographic printing, ink is completely removed from the printing plate without causing scattering and re-adhesion of ink washing liquid particles that cause deterioration in the quality of the printed matter. In addition to providing a plate cleaning apparatus for drying the surface of a printing plate, a plate cleaning apparatus capable of saving liquid and having excellent cleaning ability is provided.

請求項1の発明は、回転する版胴を有する印刷機に設置して、版胴上の印刷版を洗浄するための版洗浄装置であって、版胴の回転方向の先頭から気体流送りノズル、洗浄液噴霧ノズル、洗浄液を吸引する為の吸引ノズルを、この順で配置するとともに、洗浄カバーを用いて該気体流送りノズル、該洗浄液噴霧ノズル、該洗浄液を吸引する為の吸引ノズル、さらに少なくとも洗浄液が噴霧される版の部分を覆って内部を負圧にする構造としたことを特徴とする版洗浄装置である。   The invention of claim 1 is a plate cleaning apparatus for cleaning a printing plate on a plate cylinder, which is installed in a printing machine having a rotating plate cylinder, and a gas flow nozzle from the head in the rotation direction of the plate cylinder The cleaning liquid spray nozzle, the suction nozzle for sucking the cleaning liquid are arranged in this order, the gas flow nozzle using the cleaning cover, the cleaning liquid spray nozzle, the suction nozzle for sucking the cleaning liquid, and at least A plate cleaning apparatus characterized by having a structure in which a portion of a plate to be sprayed with a cleaning liquid is covered so as to make the inside have a negative pressure.

請求項2の発明は、前記洗浄液噴霧ノズルを刷版幅方向に1個あるいは複数個配列し、該噴霧ノズルを個別に作動させることが可能で印刷パターンによって洗浄範囲が可変であること特徴とする請求項1に記載の版洗浄装置である。   The invention according to claim 2 is characterized in that one or a plurality of the cleaning liquid spray nozzles are arranged in the plate width direction, the spray nozzles can be individually operated, and the cleaning range is variable depending on the printing pattern. The plate cleaning apparatus according to claim 1.

請求項3の発明は、前記気体送りノズルがスリット型のノズルであり、スリットギャップが0.05mmから0.1mmであり、エア圧が0.2MPaから0.3MPaであり、ノズル先端部風速が500m/秒から700m/秒であることを特徴とする請求項1または2に記載の版洗浄装置である。   According to a third aspect of the present invention, the gas feed nozzle is a slit-type nozzle, the slit gap is 0.05 mm to 0.1 mm, the air pressure is 0.2 MPa to 0.3 MPa, and the nozzle tip wind speed is The plate cleaning apparatus according to claim 1, wherein the plate cleaning apparatus has a speed of 500 m / sec to 700 m / sec.

請求項4の発明は、前記洗浄液噴霧ノズルの吐出圧を0.2MPaから0.4MPa、ノズル1個当りの流量を30ml/minから100ml/minとし、その条件下での該噴霧ノズルの作動−停止をパルス制御方式で行い、洗浄液の吐出−停止時間を0.1secから1secの間隔で繰り返すことを特徴とする請求項2または3に記載の版洗浄装置である。   According to a fourth aspect of the present invention, the discharge pressure of the cleaning liquid spray nozzle is 0.2 MPa to 0.4 MPa, the flow rate per nozzle is 30 ml / min to 100 ml / min, and the operation of the spray nozzle under the conditions- The plate cleaning apparatus according to claim 2 or 3, wherein the stop is performed by a pulse control method, and the discharge-stop time of the cleaning liquid is repeated at intervals of 0.1 sec to 1 sec.

請求項5の発明は、前記印刷機がフレキソ印刷機、オフセット印刷機、グラビア印刷機のうちのいずれかの印刷機であることを特徴とする請求項1から4のいずれか1項に記載の版洗浄装置である。   According to a fifth aspect of the present invention, the printing machine is any one of a flexographic printing machine, an offset printing machine, and a gravure printing machine, according to any one of the first to fourth aspects. It is a plate cleaning device.

請求項6の発明は、前記印刷機が高分子系有機EL素子の発光層をフレキソ印刷法で形成するためのフレキソ印刷機であることを特徴とする請求項5に記載の版洗浄装置である。   The invention of claim 6 is the plate washing apparatus according to claim 5, wherein the printing machine is a flexographic printing machine for forming a light emitting layer of a polymer organic EL element by a flexographic printing method. .

以上述べた様に、本発明の洗浄装置は高分子有機EL用フレキソ印刷法によるパターン形成後に、刷版の凸部間レリーフへ入り込んだインキを(1)洗浄液の噴霧により溶解した後、気体流送りノズルによりレリーフから吹き飛ばす動作と、(2)洗浄液を吸引ノズルにて吸引する動作を、連動させてあり、さらに排気口付きの洗浄カバーで上記の気体流送りノズル、洗浄液噴霧ノズル、洗浄液吸引ノズルのすべてと、少なくともフレキソ版の洗浄すべき部分を覆い、排気口から排気して、洗浄カバー内部を負圧にすることによって、版上のインキが洗浄液に溶解したものが微粒子となって雰囲気中へ飛散しても、排気口
から排出されるので、有機EL素子の基板に付着してしまう事態を防止することができる。負圧の程度は、大気圧力差で0.05から0.1kPaが好ましい。
As described above, the cleaning apparatus according to the present invention has the following features. (1) After the pattern is formed by the flexographic printing method for polymer organic EL, the ink that has entered the relief between the convex portions of the printing plate is dissolved by spraying the cleaning liquid, The operation of blowing the relief from the relief by the feed nozzle and (2) the operation of sucking the cleaning liquid by the suction nozzle are linked, and the above-mentioned gas flow feed nozzle, cleaning liquid spray nozzle, cleaning liquid suction nozzle are provided by a cleaning cover with an exhaust port. Cover at least the portion of the flexographic plate to be cleaned, exhaust it from the exhaust port, and make the inside of the cleaning cover negative pressure, so that the ink on the plate dissolved in the cleaning liquid becomes fine particles in the atmosphere Even if it is scattered, it is discharged from the exhaust port, so that it can be prevented from adhering to the substrate of the organic EL element. The degree of negative pressure is preferably 0.05 to 0.1 kPa in terms of atmospheric pressure difference.

また、刷版幅方向に配置された洗浄ノズルは印刷パターンにより洗浄ノズルを選択して使用する事が出来、これにより洗浄液の無駄を無くす事が出来る。   Further, the cleaning nozzle arranged in the plate width direction can be used by selecting the cleaning nozzle according to the printing pattern, thereby eliminating the waste of the cleaning liquid.

以下、本発明の実施例を、図1を参照しながら詳細に説明する。   Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.

本発明の一実施形態としては図1に示すように、気体流送りノズル1、洗浄液を噴霧する為の洗浄ノズル2、前記洗浄液を吸引する為の吸引ノズル3、が版胴の周囲に上部よりこの順に配置してあり、版胴の回転に従って、この順で版胴に相対する。これらの機器類の周辺は洗浄カバー6で覆い、雰囲気排気口7から吸引排気することによって、洗浄カバー内を負圧に保持する事で洗浄ミストの飛散防止、溶剤雰囲気の大気飛散を防止している。   As an embodiment of the present invention, as shown in FIG. 1, a gas feed nozzle 1, a cleaning nozzle 2 for spraying a cleaning liquid, and a suction nozzle 3 for sucking the cleaning liquid are disposed around the plate cylinder from above. They are arranged in this order and are opposed to the plate cylinder in this order as the plate cylinder rotates. The periphery of these devices is covered with a cleaning cover 6 and sucked and exhausted from the atmosphere exhaust port 7 to prevent the cleaning mist from scattering and the solvent atmosphere from scattering to the atmosphere by maintaining the inside of the cleaning cover at a negative pressure. Yes.

上記各ノズルは一体として固定されたユニットであり、フレキソ印刷版5を巻まきつけてある版胴4は洗浄液吸引ノズル3側から上方の洗浄ノズル2、気体流送りノズル1の方向へ回転する。そして気体流送りノズル1、洗浄ノズル2は印刷版が回転して上昇して来る方向目がけて斜め下方向に向くようにしている。この重力の利用により、洗浄効果を高めている。また、図示してないが、上記各ノズルにはホースを接続して外部に引き出し、気体流送りノズル1には圧縮空気や圧縮窒素等の圧縮気体、洗浄ノズル2には洗浄液を供給し、吸引ノズル3は排気することができるようにしている。使用する洗浄液は、有機EL剤が溶解しやすい通常低分子量の通常の有機溶剤、たとえばトルエン、キシレン等である。使用する各部材はホースを含め、使用する溶剤に対して十分な耐性があるものを使用する。さらに、使用する有機EL剤のインクに使用されている溶剤に対しても十分な耐久性を有するものを使用する。   Each of the nozzles is a unit fixed integrally, and the plate cylinder 4 around which the flexographic printing plate 5 is wound rotates from the cleaning liquid suction nozzle 3 side toward the upper cleaning nozzle 2 and the gas flow feed nozzle 1. The gas flow nozzle 1 and the cleaning nozzle 2 are directed obliquely downward toward the direction in which the printing plate rotates and rises. The use of gravity increases the cleaning effect. Although not shown, a hose is connected to each of the nozzles and drawn to the outside, compressed gas such as compressed air or compressed nitrogen is supplied to the gas flow nozzle 1, cleaning liquid is supplied to the cleaning nozzle 2, and suction is performed. The nozzle 3 can be evacuated. The cleaning liquid to be used is a normal organic solvent having a low molecular weight which is easy to dissolve the organic EL agent, for example, toluene, xylene and the like. Each member to be used should have a sufficient resistance against the solvent to be used, including a hose. Furthermore, the thing which has sufficient durability with respect to the solvent currently used for the ink of the organic EL agent to be used is used.

また、図2の様に洗浄ノズル2は版胴4の幅方向に1個或いは複数個設置されており、洗浄範囲に合わせて使用するノズルの個数、位置を自由に選択する事ができるようにしている。その結果、無駄な洗浄液を噴霧しなくて良いので、節液となり、また環境負荷的にもやさしい。   As shown in FIG. 2, one or a plurality of cleaning nozzles 2 are installed in the width direction of the plate cylinder 4 so that the number and position of nozzles to be used can be freely selected according to the cleaning range. ing. As a result, it is not necessary to spray a useless cleaning solution, so that the solution is saved and the environmental load is easy.

洗浄ノズル2は単体で幅方向に拡散噴霧する構造のものを使用し、広範囲に洗浄を行う場合は幅方向に複数個設置し、隣接ノズル間で洗浄液の抜けが発生しない様に必ず隣接ノズルから噴霧される洗浄液とは洗浄空間でオーバーラップする様に設置しなければならない。このオーバーラップ幅は幅方向で洗浄液ムラが発生しない様にノズルの性能、噴出圧、ノズルと刷版間の距離などを考慮して決める。   The cleaning nozzle 2 has a structure that diffuses and sprays in the width direction as a single unit. When performing cleaning over a wide area, install a plurality of cleaning nozzles in the width direction, and make sure that the cleaning liquid does not escape between adjacent nozzles. It must be installed so as to overlap the cleaning liquid to be sprayed in the cleaning space. This overlap width is determined in consideration of the nozzle performance, the jet pressure, the distance between the nozzle and the printing plate, and the like so that no cleaning liquid unevenness occurs in the width direction.

洗浄カバー6によって、版に衝突して跳ね返った洗浄液の粒子がその外部へ広がることを防止する。洗浄カバーの材料としてステンレス板を使用することが溶剤耐性の点で好ましい。また、洗浄カバーのサイズは不都合を生じない範囲で小さいことが、負圧に対する強度を保持させるためにも、また印刷機取り扱い上も好ましい。雰囲気排気口の先に取り付ける排気装置(図示せず)としてはブロワを使用することが好ましい。またカバーの内部は負圧にして飛散した粒子や揮発した溶剤を排出するが、負圧の程度は0.05から0.1kPaが好ましい。その理由は、0.05kPa以下では、排気が十分でなくなり飛散した粒子の排出が不十分になるからである。また0.1kPa以上では負圧に耐えるための洗浄カバーの強度が必要以上に高くなってしまうからである。   The cleaning cover 6 prevents the particles of the cleaning liquid that bounced off the plate from spreading to the outside. A stainless steel plate is preferably used as a material for the cleaning cover from the viewpoint of solvent resistance. In addition, it is preferable that the size of the cleaning cover is small so as not to cause inconvenience, in order to maintain the strength against negative pressure and also in handling the printing press. A blower is preferably used as an exhaust device (not shown) attached to the tip of the atmosphere exhaust port. The inside of the cover discharges particles and volatilized solvent that are scattered under a negative pressure. The degree of the negative pressure is preferably 0.05 to 0.1 kPa. The reason is that if the pressure is 0.05 kPa or less, the exhaust is insufficient and the scattered particles are not sufficiently discharged. Further, when the pressure is 0.1 kPa or more, the strength of the cleaning cover for withstanding the negative pressure becomes higher than necessary.

気体送りノズルには、スリット型のいわゆるエアーナイフ用として使用される型のもの
が好ましい。さらに、スリットギャップが0.5から0.1mmであるものが、供給する気体の圧力が低くても、ノズル先端から噴出する気体の速度を高くすることができるので、本発明において好適である。さらに、ノズル先端と版の間を0.5から1.5mmとすることで、洗浄液の飛散を低減することができ、ノズルへ供給する空気または窒素の圧力を0.2から0.4MPaとすることによって、洗浄液の飛散なしに、十分な洗浄液除去効果が得られる。
The gas feed nozzle is preferably of a slit type that is used for a so-called air knife. Further, the slit gap of 0.5 to 0.1 mm is preferable in the present invention because the velocity of the gas ejected from the nozzle tip can be increased even when the pressure of the gas to be supplied is low. Further, by setting the distance between the nozzle tip and the plate to be 0.5 to 1.5 mm, scattering of the cleaning liquid can be reduced, and the pressure of air or nitrogen supplied to the nozzle is 0.2 to 0.4 MPa. Thus, a sufficient cleaning liquid removing effect can be obtained without scattering of the cleaning liquid.

洗浄液噴霧ノズルの形式は扇形式が好ましく、中でも駆動型ノズルのものがパルス制御において応答性の点で好ましい。吐出圧を0.2から0.4MPaの範囲とすると、洗浄液の流量が30から100ml/minとなり、洗浄時間20から60秒程度で、洗浄液の飛散がなく、しかも十分な版洗浄効果が得られる。   The type of the cleaning liquid spray nozzle is preferably a fan type, and among these, a drive type nozzle is preferable in terms of responsiveness in pulse control. When the discharge pressure is in the range of 0.2 to 0.4 MPa, the flow rate of the cleaning liquid is 30 to 100 ml / min, the cleaning time is about 20 to 60 seconds, the cleaning liquid is not scattered, and a sufficient plate cleaning effect is obtained. .

洗浄液吸引ノズルとして使用することができるものはラビリンス型、フラット型のものがある。中でも多段ラビリンス型のものが、洗浄液として低粘度の有機溶剤を使用することが多いが、低粘度の液体の吸引に適しているので好ましい。さらに、洗浄しない部分においても液残りしにくいので、好ましい。吸引に使用する排気装置としてはブロワが好ましい。   There are a labyrinth type and a flat type that can be used as the cleaning liquid suction nozzle. Of these, the multi-stage labyrinth type is often a low-viscosity organic solvent as the cleaning liquid, but is preferable because it is suitable for sucking a low-viscosity liquid. Furthermore, it is preferable because the liquid hardly remains even in a portion that is not cleaned. A blower is preferable as an exhaust device used for suction.

以上、有機EL素子の発光層をフレキソ印刷法で形成するためのフレキソ印刷機に設置して好適な版洗浄装置について発明した事項を開示した。しかし、本発明の洗浄装置は、有機EL素子形成用と限定されたフレキソ印刷機だけでなく、その他のフレキソ印刷機において、版胴上の版の洗浄が必要であり、かつ洗浄時に版に当たって跳ね返った洗浄液や噴霧した洗浄液が被印刷物に付着して不都合、例えば混色の程度が仕様値をこえてしまう等、が発生する場合に設置して使用することが可能である。さらには、フレキソ印刷機だけでなく、オフセット印刷機、グラビア印刷機、凹版印刷機においても、回転する版胴に版を取り付ける形式の印刷機に設置して使用することが可能である。さらに、特許文献3に記載されているグラビア印刷機とオフセット印刷機を組み合わせた印刷機にも、版胴が回転するタイプであり、設置することができる。従って、請求項1から4は、回転する版胴を有する印刷機に設置する場合に対するものである。使用する部材として前記したものは、使用する洗浄液に対する耐久性があるものを、市販品のなかから選定して使用することができる。   As mentioned above, the matter which invented about the plate washing apparatus suitable for installing in the flexographic printing machine for forming the light emitting layer of an organic EL element with a flexographic printing method was disclosed. However, the cleaning apparatus of the present invention is not limited to flexographic printing machines limited to forming organic EL elements, but in other flexographic printing machines, the plate on the plate cylinder needs to be cleaned, and the plate hits the plate at the time of cleaning and rebounds. It can be installed and used in the case where an inconvenience occurs when the cleaning liquid or the sprayed cleaning liquid adheres to the printing material, for example, the degree of color mixing exceeds the specification value. Furthermore, not only a flexographic printing machine but also an offset printing machine, a gravure printing machine, and an intaglio printing machine can be installed and used in a printing machine in which a plate is attached to a rotating plate cylinder. Furthermore, a printing press in which a gravure printing machine and an offset printing machine described in Patent Document 3 are combined is a type in which a plate cylinder rotates and can be installed. Accordingly, claims 1 to 4 relate to the case where the printer is installed in a printing press having a rotating plate cylinder. As the members to be used, those described above that are durable to the cleaning liquid to be used can be selected from commercially available products.

一般の回転する版胴を有する印刷機に設置した場合には、本発明の洗浄装置は印刷機の回転する版胴上の印刷版(刷版)によるパターン形成後に、刷版上のインキを(1)洗浄液の噴霧により溶解した後、気体流送りノズルにより版上から吹き飛ばす動作と、(2)洗浄液を吸引ノズルにて吸引する動作を、連動させてあり、さらに排気口付きの洗浄カバーで上記の気体流送りノズル、洗浄液噴霧ノズル、洗浄液吸引ノズルのすべてと、少なくとも印刷版の洗浄すべき部分を覆い、排気口から排気して、洗浄カバー内部を負圧にしている。その結果、版上のインキが洗浄液に溶解したものが微粒子となって雰囲気中へ飛散しても、また、洗浄液が版に到達することなくそのまま飛散しても、排気口から排出されるので、被印刷物に付着してしまう事態を防止することができる。   When installed in a printing press having a general rotating plate cylinder, the cleaning device of the present invention applies the ink on the printing plate after pattern formation by the printing plate (press plate) on the rotating plate cylinder of the printing press ( 1) After dissolving by spraying the cleaning liquid, the operation of blowing off from the plate by the gas flow nozzle and (2) the operation of sucking the cleaning liquid by the suction nozzle are linked, and the above-mentioned cleaning cover with an exhaust port The gas flow feed nozzle, the cleaning liquid spray nozzle, and the cleaning liquid suction nozzle, and at least the portion to be cleaned of the printing plate are covered, and exhausted from the exhaust port to make the inside of the cleaning cover have a negative pressure. As a result, even if the ink on the plate dissolved in the cleaning liquid becomes fine particles and scatters in the atmosphere, or even if the cleaning liquid scatters without reaching the plate, it is discharged from the exhaust port, The situation where it adheres to a to-be-printed material can be prevented.

使用した印刷機はフレキソ印刷法で有機EL素子の発光層を印刷するためのフレキソ印刷機の実験機である。   The used printing machine is an experimental machine of a flexographic printing machine for printing a light emitting layer of an organic EL element by a flexographic printing method.

気体流送りノズルはスリット型を採用し、スリットギャップ0.05mm、幅方向300mm長のノズルを使用した。また、圧縮空気を使用し、圧力を0.2MPaとした。ノズル先端部風速は500m/秒であった。洗浄ノズルはパルスジェット型のものを1個用いた。洗浄液の吐出圧を0.2MPaとし、洗浄ノズルのON−OFFは0.5sec毎
に繰り返し行った。その時の、流量は80ml/min、噴霧する際の広がり角度は115度であった。また、洗浄液吸引ノズルは開口面積を狭くする為、ノズルと版面間のクリアランスを0.5mm〜1mm程度に押さえた。吸引流量は1.4m3/minであった。
The gas flow nozzle adopted a slit type, and used a nozzle having a slit gap of 0.05 mm and a width direction of 300 mm. Moreover, compressed air was used and the pressure was 0.2 MPa. The nozzle tip wind speed was 500 m / sec. One washing nozzle of the pulse jet type was used. The discharge pressure of the cleaning liquid was 0.2 MPa, and the cleaning nozzle was repeatedly turned on and off every 0.5 sec. At that time, the flow rate was 80 ml / min, and the spread angle when spraying was 115 degrees. Further, in order to narrow the opening area of the cleaning liquid suction nozzle, the clearance between the nozzle and the plate surface was suppressed to about 0.5 mm to 1 mm. The suction flow rate was 1.4 m 3 / min.

洗浄カバー内の圧力を大気圧力差で0.1Paとなるように雰囲気排気口からブロワを用いて排気した。   The pressure in the cleaning cover was exhausted from the atmosphere exhaust port using a blower so that the atmospheric pressure difference was 0.1 Pa.

版胴の回転スピードを10mm/sec以下で110℃程度の低沸点有機溶剤を使用して15sec洗浄した結果、使用洗浄液量は20mlと少なく、印刷パターン面積450cm2内について良好な洗浄結果が得られた。また、印刷パターン上には、洗浄液が版から跳ね返って飛散し乾燥した微粒子は見あたらなかった。 As a result of the plate cylinder rotating at a speed of 10 mm / sec or less and using a low-boiling organic solvent of about 110 ° C. for 15 sec, the amount of cleaning liquid used is as small as 20 ml, and a good cleaning result is obtained within a printed pattern area of 450 cm 2 . It was. In addition, no fine particles were found on the printed pattern as the cleaning liquid bounced off the plate and scattered.

本発明の版洗浄装置の基本となる側面概略図である。It is the side schematic diagram used as the basis of the plate washing apparatus of the present invention. 洗浄ノズルの正面図である。It is a front view of a washing nozzle.

符号の説明Explanation of symbols

1 気体流送りノズル(エアーノズル)
2 洗浄ノズル
3 吸引ノズル
4 版胴
5 フレキソ版
6 洗浄用カバー
7 雰囲気排気口
8 有機EL素子形成用透明基板
9 基板設置用定盤
1 Gas flow feed nozzle (air nozzle)
2 Cleaning nozzle 3 Suction nozzle 4 Plate cylinder 5 Flexo plate 6 Cleaning cover 7 Atmospheric exhaust port 8 Transparent substrate for organic EL element formation 9 Surface plate for substrate installation

Claims (6)

回転する版胴を有する印刷機に設置して、版胴上の印刷版を洗浄するための版洗浄装置であって、版胴の回転方向の先頭から気体流送りノズル、洗浄液噴霧ノズル、洗浄液を吸引する為の吸引ノズルを、この順で配置するとともに、洗浄カバーを用いて該気体流送りノズル、該洗浄液噴霧ノズル、該洗浄液を吸引する為の吸引ノズル、さらに少なくとも洗浄液が噴霧される版の部分を覆って内部を負圧にする構造としたことを特徴とする版洗浄装置。   A plate cleaning device installed in a printing press having a rotating plate cylinder to clean the printing plate on the plate cylinder, which has a gas feed nozzle, a cleaning liquid spray nozzle, and a cleaning liquid from the top in the rotational direction of the plate cylinder. The suction nozzles for suction are arranged in this order, and the gas flow feed nozzle, the cleaning liquid spray nozzle, the suction nozzle for sucking the cleaning liquid, and at least the plate on which the cleaning liquid is sprayed using the cleaning cover A plate cleaning apparatus characterized by having a structure in which the inside is covered with a negative pressure. 前記洗浄液噴霧ノズルを刷版幅方向に1個あるいは複数個配列し、該噴霧ノズルを個別に作動させることが可能で印刷パターンによって洗浄範囲が可変であること特徴とする請求項1に記載の版洗浄装置。   2. The plate according to claim 1, wherein one or a plurality of the cleaning liquid spray nozzles are arranged in the plate width direction, the spray nozzles can be individually operated, and the cleaning range is variable depending on the printing pattern. Cleaning device. 前記気体送りノズルがスリット型のノズルであり、スリットギャップが0.05mmから0.1mmであり、エア圧が0.2MPaから0.3MPaであり、ノズル先端部風速が500m/秒から700m/秒であることを特徴とする請求項1または2に記載の版洗浄装置。   The gas feed nozzle is a slit type nozzle, the slit gap is 0.05 mm to 0.1 mm, the air pressure is 0.2 MPa to 0.3 MPa, and the nozzle tip wind speed is 500 m / sec to 700 m / sec. The plate cleaning apparatus according to claim 1 or 2, wherein 前記洗浄液噴霧ノズルの吐出圧を0.2MPaから0.4MPa、ノズル1個当りの流量を30ml/minから100ml/minとし、その条件下での該噴霧ノズルの作動−停止をパルス制御方式で行い、洗浄液の吐出−停止時間を0.1secから1secの間隔で繰り返すことを特徴とする請求項2または3に記載の版洗浄装置。   The discharge pressure of the cleaning liquid spray nozzle is set to 0.2 MPa to 0.4 MPa, the flow rate per nozzle is set to 30 ml / min to 100 ml / min, and the spray nozzle is operated and stopped under the conditions by a pulse control method. The plate cleaning apparatus according to claim 2, wherein the cleaning liquid discharge-stop time is repeated at intervals of 0.1 sec to 1 sec. 前記印刷機がフレキソ印刷機、オフセット印刷機、グラビア印刷機のうちのいずれかの印刷機であることを特徴とする請求項1から4のいずれか1項に記載の版洗浄装置。   The plate washing apparatus according to any one of claims 1 to 4, wherein the printing machine is a printing machine selected from a flexographic printing machine, an offset printing machine, and a gravure printing machine. 前記印刷機が高分子系有機EL素子の発光層をフレキソ印刷法で形成するためのフレキソ印刷機であることを特徴とする請求項5に記載の版洗浄装置。   6. The plate cleaning apparatus according to claim 5, wherein the printing machine is a flexographic printing machine for forming a light emitting layer of a polymer organic EL element by a flexographic printing method.
JP2006267203A 2006-09-29 2006-09-29 Printing plate cleaning equipment Expired - Fee Related JP4984796B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010011626A (en) * 2008-06-26 2010-01-14 Jtekt Corp Rotor for electric motor
JP2011161906A (en) * 2010-01-13 2011-08-25 Dainippon Screen Mfg Co Ltd Printing apparatus and printing method
JP2015155177A (en) * 2014-02-21 2015-08-27 株式会社小森コーポレーション gravure printing machine

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JPS58125030U (en) * 1982-02-19 1983-08-25 株式会社磯輪鉄工所 Cleaning equipment in printing presses
JPS633445U (en) * 1986-06-25 1988-01-11
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JP2006248065A (en) * 2005-03-11 2006-09-21 Toppan Printing Co Ltd Ink supply base material for letterpress printing, and apparatus and method for printing using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010011626A (en) * 2008-06-26 2010-01-14 Jtekt Corp Rotor for electric motor
JP2011161906A (en) * 2010-01-13 2011-08-25 Dainippon Screen Mfg Co Ltd Printing apparatus and printing method
JP2015155177A (en) * 2014-02-21 2015-08-27 株式会社小森コーポレーション gravure printing machine

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